Body wash composition

ABSTRACT

A personal care composition is provided, comprising: a vehicle; a surfactant, wherein the surfactant includes at least one alkyl polyglucoside; a water-soluble cellulose ether base material substituted with a hydrophobic group having a carbon chain with 8 to 15 carbon atoms; wherein the water-soluble cellulose ether base material has a weight average molecular weight, Mw, of &gt;800,000 Daltons; and wherein the personal care composition contains &lt;0.01 wt % alkyl sulfate and &lt;0.01 wt % alkyl ether sulfate.

This application is a 371 of PCT/US2017/047277, filed on Aug. 17, 2017,which claims benefit of Provisional Ser. No. 62/381,181, filed Aug. 30,2016.

The present invention relates to a personal care composition. Inparticular, the present invention relates to a personal carecomposition: a vehicle; a surfactant, wherein the surfactant includes atleast one alkyl polyglucoside; a water-soluble cellulose ether basematerial substituted with a hydrophobic group having a carbon chain with8 to 15 carbon atoms; wherein the water-soluble cellulose ether basematerial has a weight average molecular weight, Mw, of >800,000 Daltons;and, wherein the personal care composition contains <0.01 wt % alkylsulfate and <0.01 wt % alkyl ether sulfate.

Conventional personal care systems such as shaving formulations (e.g.,shaving creams and shaving gels), shampoos, hair conditioners, facialcleansing products, hair coloring systems, skin creams, lotions, underarm products (e.g., deodorants, antiperspirants), personal lubricatinggels, oral care formulations (e.g., mouth washes, mouth moisturizers),hair styling agents (e.g., hair gels, mousses), hand soaps, shower gels,body washes, make-up products, sun screen systems have used commerciallyavailable polysaccharides such as nonionic water-soluble polysaccharideethers (e.g., methyl cellulose (MC), hydroxypropyl methylcellulose(HPMC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC),ethyl hydroxyethyl cellulose (EHEC)), hydroxypropyl (HP) guar,hydroxyethyl guar, and hydroxypropyl starch and other nonionic starchand guar derivatives. Some hydrophobically modified polysaccharides havealso been used in personal care products. The use of polysaccharides inpersonal care products face certain processing hurdles includingincompatibility with other desirable ingredients, insolubility withcertain other desirable ingredients, turbidity (when clarity is desired)and formulation stability.

Body washes (sometimes also referred to as shower gels) are a generalterm used to describe liquid surfactant containing formulations used toclean the body. While sometimes considered generically as “soap”, suchbody wash formulations frequently do not contain soaps such as sodium orpotassium salts of fatty acids. Conventional body wash formulations,typically contain one of a variety of components including one or moresurfactants, various emollients, fragrances and other personal careingredients. Conventional body washes offer less skin irritation,improved lather in hard water conditions and leave less residues on theskin and bathroom fixtures when compared with common soaps.

Conventional body wash formulations use a surfactant system consistingof a mixture of sodium laureth sulfate (SLES) (an anionic surfactant)and cocamidopropyl betaine (a zwitterionic surfactant). This surfactantmixture is frequently referred to as a SLES/betaine surfactant mixture.While relatively inexpensive and effective, there is pressure fromconsumers to find a replacement for SLES in personal care compositions.There exists a belief by some that SLES may be a skin irritant. Therealso exists a belief by some that SLES may potentially contain lowconcentrations of 1,4-dioxane. Accordingly, some brand owners areseeking to provide “sulfate-free” formulations (i.e., personal carecompositions (e.g., body washes) that do not contain SLES). There isalso a perceived consumer demand for benign surfactants that are derivedfrom biorenewable sources. Two types of such biorenewable surfactantsinclude alkyl polyglucosides (APG) which are derivable from glucose andother monosaccharides and glycinate surfactants such as sodium cocoylglycinate which may be derived from amino acids such as glycine.

Consumers expect that personal care compositions such as body washformulations will exhibit a suitable viscosity. This viscosity serves atleast two purposes. First, it improves handling and spreading of thecomposition. Second, it acts as a sensory cue that consumers tend toassociate with product efficacy. Conventional SLES/betaine systems areeasily thickened to a suitable viscosity using sodium chloride, a cheapand non-toxic material. Personal care compositions formulated witheither APG or glycinate surfactants in substitution for SLES/betainetend to be watery (non-viscous) in nature and are not subject tothickening through the addition of sodium chloride or other commonlyused thickening agents. That is, many common polymers used to thickenconventional personal care compositions formulated with SLES/betainesuch as hydroxyethyl cellulose (HEC) are incompatible with APG orglycinate surfactant compositions.

Accordingly, there remains a need for personal care compositions thatare sulfate free but nevertheless exhibit a suitable viscosity. Inparticular, there remains a need for sulfate free body washcompositions.

The present invention provides a personal care composition, comprising:a vehicle; a surfactant, wherein the surfactant includes at least onealkyl polyglucoside; a water-soluble cellulose ether base materialsubstituted with a hydrophobic group having a carbon chain with 8 to 15carbon atoms; wherein the water-soluble cellulose ether base materialhas a weight average molecular weight, Mw, of >800,000 Daltons; andwherein the personal care composition contains <0.01 wt % alkyl sulfateand <0.01 wt % alkyl ether sulfate.

The present invention provides a personal care composition, comprising:a vehicle; a surfactant, wherein the surfactant includes at least onealkyl polyglucoside; a water-soluble cellulose ether base materialsubstituted with a hydrophobic group; wherein the water-solublecellulose ether base material is hydroxyethyl cellulose; wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons; wherein the hydrophobic groupis a C₈₋₁₂ linear or branched alkyl group bonded to the water-solublecellulose ether base material; wherein the personal care compositioncontains <0.01 wt % alkyl sulfate and <0.01 wt % alkyl ether sulfate;and wherein the personal care composition is a body wash formulation.

The present invention provides a personal care composition, comprising:a vehicle; a surfactant, wherein the surfactant includes at least onealkyl polyglucoside; a water-soluble cellulose ether base materialsubstituted with a hydrophobic group; wherein the water-solublecellulose ether base material is hydroxyethyl cellulose; wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons; wherein the hydrophobic groupis a C₈₋₁₂ linear or branched alkyl group bonded to the water-solublecellulose ether base material; wherein the hydrophobic group is bondedto the water-soluble cellulose ether base material through an etherlinkage or an ether linkage and a 2-hydroxypropyl group; wherein thepersonal care composition contains <0.01 wt % alkyl sulfate and <0.01 wt% alkyl ether sulfate; and wherein the personal care composition is abody wash formulation.

The present invention provides a personal care composition, comprising:a vehicle; a surfactant, wherein the surfactant includes at least onealkyl polyglucoside; a water-soluble cellulose ether base materialsubstituted with a hydrophobic group; wherein the water-solublecellulose ether base material is hydroxyethyl cellulose; wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of 900,000 to 2,500,000 Daltons; wherein thehydrophobic group is a C₈₋₁₂ linear or branched alkyl group bonded tothe water-soluble cellulose ether base material; wherein the hydrophobicgroup is bonded to the water-soluble cellulose ether base materialthrough an ether linkage or an ether linkage and a 2-hydroxypropylgroup; wherein the personal care composition contains <0.01 wt % alkylsulfate and <0.01 wt % alkyl ether sulfate; and wherein the personalcare composition is a body wash formulation.

DETAILED DESCRIPTION

We have surprisingly found that sulfate free personal care compositionscan be appropriately thickened using a water-soluble cellulose etherbase material substituted with a hydrophobic group having a carbon chainwith 8 to 15 carbon atoms; wherein the water-soluble cellulose etherbase material has a weight average molecular weight, MW, of >800,000Daltons; and, wherein the personal care composition contains <0.01 wt %alkyl sulfate and <0.01 wt % alkyl ether sulfate.

Unless otherwise indicated, ratios, percentages, parts, and the like areby weight.

As used herein, unless otherwise indicated, the phrase “molecularweight” or Mw refers to the weight average molecular weight as measuredin a conventional manner with gel permeation chromatography (GPC) andpoly(ethylene oxide) standards. GPC techniques are discussed in detailin Modem Size Exclusion Chromatography, W. W. Yau, J. J. Kirkland, D. D.Bly; Wiley-Interscience, 1979, and in A Guide to MaterialsCharacterization and Chemical Analysis, J. P. Sibilia; VCH, 1988, p.81-84. Molecular weights are reported herein in units of Daltons.

The term “cosmetically acceptable” as used herein and in the appendedrefers to ingredients typically used in personal care compositions, andis intended to underscore that materials that are toxic when present inthe amounts typically found in personal care compositions are notcontemplated as part of the present invention.

Preferably, the personal care composition of the present invention,comprises: a vehicle (preferably, wherein the vehicle is selected fromthe group consisting of water and aqueous C₁₋₄ alcohol mixtures); asurfactant, wherein the surfactant includes at least one alkylpolyglucoside (preferably, wherein the at least one alkyl polyglucosideis selected from the group consisting of lauryl glucoside,coco-glucoside, decyl glucoside and mixtures thereof); a water-solublecellulose ether base material (preferably, wherein the water-solublecellulose ether base material is selected from the group consisting ofhydroxyethyl cellulose, hydroxypropyl cellulose, ethyl hydroxyethylcellulose, methyl cellulose, hydroxypropyl methyl cellulose,hydroxyethyl methyl cellulose) substituted with a hydrophobic grouphaving a carbon chain with 8 to 15 carbon atoms (preferably, wherein thehydrophobic group contains a linear or branched carbon chain with 8 to12 carbon atoms; more preferably, wherein the hydrophobic group is aC₈₋₁₂ linear or branched alkyl group bonded to the water-solublecellulose ether base material through at least one of an ether linkage(e.g., an ether linkage alone or an ether linkage and a 2-hydroxypropylgroup), an ester linkage, an amide linkage and a urethane linkage; mostpreferably, wherein the hydrophobic group is a C₈₋₁₂ alkyl group bondedto the water-soluble cellulose ether base material via either an etherlinkage alone or an ether linkage and a 2-hydroxypropyl group); whereinthe water-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons (preferably, 875,000 to5,000,000 Daltons; more preferably, 900,000 to 2,500,000 Daltons; mostpreferably, 1,250,000 to 1,750,000 Daltons); and, wherein the personalcare composition contains <0.01 wt % alkyl sulfate and <0.01 wt % alkylether sulfate (preferably, <0.001 wt % alkyl sulfate and <0.001 wt %alkyl ether sulfate; more preferably, <0.0001 wt % alkyl sulfate and<0.0001 wt % alkyl ether sulfate; most preferably, <a detectable limitof alkyl sulfate and <a detectable limit of alkyl ether sulfate).

Preferably, the personal care composition of the present inventioncontains <0.01 wt % alkyl sulfate and <0.01 wt % alkyl ether sulfate.More preferably, the personal care composition of the present inventioncontains <0.001 wt % alkyl sulfate and <0.001 wt % alkyl ether sulfate.Still more preferably, the personal care composition of the presentinvention contains <0.0001 wt % alkyl sulfate and <0.0001 wt % alkylether sulfate. Most preferably, the personal care composition of thepresent invention contains <a detectable limit of alkyl sulfate and <adetectable limit of alkyl ether sulfate.

Preferably, the personal care composition of the present invention,comprises a vehicle, wherein the vehicle is selected from the groupconsisting of water, water and C₁₋₄ alcohol mixture. More preferably,the personal care composition of the present invention, comprises: avehicle, wherein the vehicle comprises water. Most preferably, thepersonal care composition of the present invention, comprises: avehicle, wherein the vehicle is water.

Preferably, the personal care composition of the present invention,contains 50 to 99 wt % vehicle. More preferably, the personal carecomposition contains 70 to 95 wt % vehicle. Most preferably, thepersonal care composition contains 75 to 90 wt % vehicle.

Preferably, the personal care composition of the present invention,contains 50 to 99 wt % water. More preferably, the personal carecomposition contains 70 to 95 wt % water. Most preferably, the personalcare composition contains 75 to 90 wt % water.

Preferably, the personal care composition of the present invention,comprises a surfactant, wherein the surfactant includes at least onealkyl polyglucoside. Preferably, the at least one alkyl polyglucoside isselected from the group consisting of lauryl glucoside, coco-glucoside,decyl glucoside and mixtures thereof.

Preferably, the personal care composition of the present inventionfurther comprises an additional surfactant, wherein the additionalsurfactant is selected from the group consisting of glycinates (e.g.,sodium cocoyl glycinate), betaines (e.g., alkyl betaines such as cetylbetaine and amido betaines such as cocamidopropyl betaine), taurates(e.g., sodium methyl cocoyl taurate), glutamates (e.g., sodium cocoylglutamate), sarcosinates (e.g., sodium lauroyl sarcosinate),isethionates (e.g., sodium cocoyl isethionate, sodium lauroyl methylisethionate), sulfoacetates (e.g., sodium lauryl sulfoacetate),alaninates (e.g., sodium cocoyl alaninate), amphoacetates (e.g., sodiumcocoamphoacetate), sulfonates (e.g., sodium C₁₄₋₁₆ olefin sulfonate),succinates (e.g., disodium lauryl sulfosuccinate) and mixtures thereof.More preferably, the personal care composition of the present inventionfurther comprises an additional surfactant, wherein the additionalsurfactant includes at least one of a betaine, a glycinate and asuccinate. Most preferably, the personal care composition of the presentinvention further comprises an additional surfactant, wherein theadditional surfactant includes at least one of cocamidopropyl betaine,sodium cocoyl glycinate and disodium lauryl sulfosuccinate.

Preferably, the personal care composition of the present invention,comprises 0.01 to 35 wt % of a surfactant, wherein the surfactantincludes at least one alkyl polyglycoside. More preferably, the personalcare composition of the present invention, comprises 1 to 30 wt % of asurfactant, wherein the surfactant includes at least one alkylpolyglycoside. Still more preferably, the personal care composition ofthe present invention, comprises 4 to 25 wt % of a surfactant, whereinthe surfactant includes at least one alkyl polyglycoside. Mostpreferably, the personal care composition of the present invention,comprises 10 to 20 wt % of a surfactant, wherein the surfactant includesat least one alkyl polyglycoside.

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material. Morepreferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material is selected from the groupconsisting of hydroxyethyl cellulose, hydroxypropyl cellulose, ethylhydroxyethyl cellulose, methyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methyl cellulose and mixtures thereof. Stillmore preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material is selected from the groupconsisting of hydroxyethyl cellulose, hydroxypropyl cellulose andmixtures thereof. Most preferably, the personal care composition of thepresent invention, comprises a water-soluble cellulose ether basematerial, wherein the water-soluble cellulose ether base material ishydroxyethyl cellulose.

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons. More preferably, the personalcare composition of the present invention, comprises a water-solublecellulose ether base material, wherein the water-soluble cellulose etherbase material has a weight average molecular weight, Mw, of 875,000 to5,000,000 Daltons. Still more preferably, the personal care compositionof the present invention, comprises a water-soluble cellulose ether basematerial, wherein the water-soluble cellulose ether base material has aweight average molecular weight, Mw, of 900,000 to 2,500,000 Daltons.Most preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of 1,250,000 to 1,750,000 Daltons).

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons (preferably, 875,000 to5,000,000 Daltons; more preferably, 900,000 to 2,500,000 Daltons; mostpreferably, 1,250,000 to 1,750,000 Daltons); and wherein thewater-soluble cellulose ether base material is selected from the groupconsisting of hydroxyethyl cellulose, hydroxypropyl cellulose, ethylhydroxyethyl cellulose, methyl cellulose, hydroxypropyl methylcellulose, hydroxyethyl methyl cellulose and mixtures thereof. Stillmore preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons (preferably, 875,000 to5,000,000 Daltons; more preferably, 900,000 to 2,500,000 Daltons; mostpreferably, 1,250,000 to 1,750,000 Daltons); and wherein thewater-soluble cellulose ether base material is selected from the groupconsisting of hydroxyethyl cellulose, hydroxypropyl cellulose andmixtures thereof. Most preferably, the personal care composition of thepresent invention, comprises a water-soluble cellulose ether basematerial, wherein the water-soluble cellulose ether base material has aweight average molecular weight, Mw, of >800,000 Daltons (preferably,875,000 to 5,000,000 Daltons; more preferably, 900,000 to 2,500,000Daltons; most preferably, 1,250,000 to 1,750,000 Daltons); and whereinthe water-soluble cellulose ether base material is hydroxyethylcellulose.

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material is substituted with ahydrophobic group having a carbon chain with 8 to 15 carbon atoms. Morepreferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material is substituted with ahydrophobic group having a linear or branched carbon chain with 8 to 12carbon atoms bonded to the water-soluble cellulose ether base materialthrough at least one of an ether linkage (e.g., an ether linkage aloneor an ether linkage and a 2-hydroxypropyl group), an ester linkage, anamide linkage and a urethane linkage. Still more preferably, thepersonal care composition of the present invention, comprises awater-soluble cellulose ether base material, wherein the water-solublecellulose ether base material is substituted with a hydrophobic group,wherein the hydrophobic group is a C₈₋₁₂ linear or branched alkyl groupbonded to the water-soluble cellulose ether base material through atleast one of an ether linkage (e.g., an ether linkage alone or an etherlinkage and a 2-hydroxypropyl group), an ester linkage, an amide linkageand a urethane linkage. Most preferably, the personal care compositionof the present invention, comprises a water-soluble cellulose ether basematerial, wherein the water-soluble cellulose ether base material issubstituted with a hydrophobic group, wherein the hydrophobic group is aC₈₋₁₂ linear or branched alkyl group bonded to the water-solublecellulose ether base material via an ether linkage alone (as in FormulaI) or an ether linkage and a 2-hydroxypropyl group (as in Formula II)

wherein Cell-O is the water-soluble cellulose ether base material andwherein R is the C₈₋₁₂ linear or branched alkyl group.

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material, wherein thewater-soluble cellulose ether base material is substituted with ahydrophobic group having a carbon chain with 8 to 15 carbon atoms;wherein the degree of substitution, DS, of the hydrophobic group ontothe water-soluble cellulose ether base material is 0.01 to 1 (morepreferably, 0.02 to 0.2; most preferably, 0.025 to 0.1).

Preferably, the personal care composition of the present invention,comprises a water-soluble cellulose ether base material substituted witha hydrophobic group having a carbon chain with 8 to 15 carbon atoms.More preferably, the personal care composition of the present invention,comprises 0.1 to 15 wt % of a water-soluble cellulose ether basematerial substituted with a hydrophobic group having a carbon chain with8 to 15 carbon atoms. Still more preferably, the personal carecomposition of the present invention, comprises 0.25 to 10 wt % of awater-soluble cellulose ether base material substituted with ahydrophobic group having a carbon chain with 8 to 15 carbon atoms. Yetmore preferably, the personal care composition of the present invention,comprises 0.5 to 5 wt % of a water-soluble cellulose ether base materialsubstituted with a hydrophobic group having a carbon chain with 8 to 15carbon atoms. Most preferably, the personal care composition of thepresent invention, comprises 0.75 to 2 wt % of a water-soluble celluloseether base material substituted with a hydrophobic group having a carbonchain with 8 to 15 carbon atoms.

Preferably, the personal care composition of the present invention,further comprises at least one personal care ingredient. Morepreferably, the personal care composition of the present invention,further comprises at least one personal care ingredient, wherein thepersonal care ingredient is selected from the group consisting ofemollients (e.g., hydrocarbon oils, esters, natural oils), cosmeticallyacceptable silicones (e.g., amodimethicone, cyclomethicone, dimethicone,dimethiconol, hexadecyl methicone, hexamethyldisiloxane, methicone,phenyl dimethicone, stearoxy dimethicone), waxes, soaps, sensorymodifiers, lubricants, preservatives (e.g., benzoic acid, sorbic acid,phenoxyethanol), antioxidants (e.g., butylated hydroxytoluene),chelating agents, antimicrobials, pH adjustingagents/buffers/neutralizing agents, humectants (e.g., glycerin,sorbitol, monoglycerides, lecithins, glycolipids, fatty alcohols, fattyacids, polysaccharides, sorbitan esters, polysorbates (e.g., Polysorbate20, Polysorbate 40, Polysorbate 60, and Polysorbate 80), diols (e.g.,propylene glycol), diol analogs, triols, triol analogs, polymericpolyols), sunscreen actives, vitamins, proteins/amino acids, plantextracts, natural ingredients, bio-actives, fragrances/perfumes,penetrants, polymers/resins/hair fixatives/film formers,surfactants/detergents/emulsifiers/opacifying agents,volatiles/propellants/solvents/carriers, liquidvehicles/solvents/carriers, salts, anti-static agents, anti-frizzagents, antidandruff agents, hair waving/straightening agents,absorbents, colorants, hard particles, and conditioning agents.

Preferably, the personal care composition of the present invention is apersonal care composition selected from the group consisting ofshampoos, leave-on hair conditioners, rinse-off hair conditioners, haircoloring agents, hair styling gels, soaps, body wash formulations,sunscreen agents and the like. More preferably, the personal carecomposition of the present invention is a personal care compositionselected from the group consisting of shampoos, leave-on hairconditioners, rinse-off hair conditioners, hair coloring agents, hairstyling gels, soaps, body wash formulations, sunscreen agents and thelike; wherein the personal care composition contains <0.01 wt %(preferably <0.001 wt %; more preferably, <0.0001 wt %; most preferably,<a detectable limit) of alkyl sulfate and <0.01 wt % (preferably <0.001wt %; more preferably, <0.0001 wt %; most preferably, <a detectablelimit) of alkyl ether sulfate. More preferably, the personal carecomposition of the present invention is selected from the groupconsisting of shampoos, conditioners, hair styling agents and body washformulations; wherein the personal care composition contains <0.01 wt %(preferably <0.001 wt %; more preferably, <0.0001 wt %; most preferably,<a detectable limit) of alkyl sulfate and <0.01 wt % (preferably <0.001wt %; more preferably, <0.0001 wt %; most preferably, <a detectablelimit) of alkyl ether sulfate. Most preferably, the personal carecomposition of the present invention is a body wash formulation; whereinthe body wash formulation contains <0.01 wt % (preferably <0.001 wt %;more preferably, <0.0001 wt %; most preferably, <a detectable limit) ofalkyl sulfate and <0.01 wt % (preferably <0.001 wt %; more preferably,<0.0001 wt %; most preferably, <a detectable limit) of alkyl ethersulfate.

Preferably, the personal care composition of the present invention is abody wash formulation. More preferably, the personal care composition ofthe present invention is a body wash formulation, wherein the surfactantincludes at least one alkyl polyglucoside; wherein the water-solublecellulose ether base material is hydroxyethyl cellulose (preferably,wherein the water-soluble cellulose ether base material has a weightaverage molecular weight, Mw, of >800,000 Daltons (preferably, 875,000to 5,000,000 Daltons; more preferably, 900,000 to 2,500,000 Daltons;most preferably, 1,250,000 to 1,750,000 Daltons); and wherein thewater-soluble cellulose ether base material is substituted with ahydrophobic group having a linear or branched carbon chain with 8 to 12carbon atoms bonded to the water-soluble cellulose ether base materialthrough at least one of an ether linkage (e.g., an ether linkage aloneor an ether linkage and a 2-hydroxypropyl group), an ester linkage, anamide linkage and a urethane linkage (more preferably, wherein thewater-soluble cellulose ether base material is substituted with ahydrophobic group, wherein the hydrophobic group is a C₈₋₁₂ linear orbranched alkyl group bonded to the water-soluble cellulose ether basematerial through at least one of an ether linkage (e.g., an etherlinkage alone or an ether linkage with a 2-hydroxypropyl group), anester linkage, an amide linkage and a urethane linkage; most preferably,wherein the water-soluble cellulose ether base material is substitutedwith a hydrophobic group, wherein the hydrophobic group is a C₈₋₁₂linear or branched alkyl group bonded to the water-soluble celluloseether base material through either an ether linkage alone or an etherlinkage and a 2-hydroxypropyl group.

Preferably, the personal care composition of the present invention is abody wash formulation, wherein the body wash formulation has a viscosityof ≥3,000 mPa·s as determined according to the method used herein in theExamples. More preferably, the personal care composition of the presentinvention is a body wash formulation, wherein the body wash formulationhas a viscosity of 3,000 to 15,000 mPa·s as determined according to themethod used herein in the Examples. Still more preferably, the personalcare composition of the present invention is a body wash formulation,wherein the body wash formulation has a viscosity of 4,000 to 12,000mPa·s as determined according to the method used herein in the Examples.Most preferably, the personal care composition of the present inventionis a body wash formulation, wherein the body wash formulation has aviscosity of 5,000 to 9,000 mPa·s as determined according to the methodused herein in the Examples.

Preferably, the personal care composition of the present inventionfurther comprises a pH adjusting agent. More preferably, the personalcare composition of the present invention, further comprises a pHadjusting agent, wherein the personal care composition is a body washformulation. Most preferably, the personal care composition of thepresent invention, further comprises a pH adjusting agent, wherein thepersonal care composition is a body wash formulation and wherein thebody wash formulation has a pH of 5 to 9 (preferably, 6 to 8; mostpreferably, 6.25 to 7.75).

Preferably, the pH adjusting agent is selected from the group consistingof citric acid, lactic acid, hydrochloric acid, aminoethyl propanediol,triethanolamine, monoethanolamine, sodium hydroxide, potassiumhydroxide, amino-2-methyl-1-propanol. More preferably, the pH adjustingagent is selected from the group consisting of citric acid, lactic acid,sodium hydroxide, potassium hydroxide, triethanolamine,amino-2-methyl-1-propanol. Most preferably, the pH adjusting agent isselected from the group consisting of citric acid and sodium hydroxide.

Preferably, the personal care composition of the present inventionfurther comprises a biocide. More preferably, the personal carecomposition of the present invention further comprises a biocide,wherein the biocide is selected from the group consisting ofphenoxyethanol, benzoic acid, benzyl alcohol, sodium benzoate, DMDMhydantoin, 2-ethylhexyl glyceryl ether and isothiazolinone (e.g.,methylchloroisothiazolinone, methylisothiazolinone). Still morepreferably, the personal care composition of the present invention,further comprises a biocide, wherein the biocide is an isothiazolinone(more preferably, wherein the biocide is selected from the groupconsisting of methylisothiazolinone, methylchloroisothiazolinone andmixtures thereof; most preferably, wherein the biocide ismethylisothiazolinone). Most preferably, the personal care compositionof the present invention, further comprises a biocide, wherein thebiocide is an isothiazolinone (more preferably, wherein the biocide isselected from the group consisting of methylisothiazolinone,methylchloroisothiazolinone and mixtures thereof; most preferably,wherein the biocide is methylisothiazolinone); and wherein the personalcare composition is a body wash formulation.

Preferably, the personal care composition of the present inventionfurther comprises a soap. More preferably, the personal care compositionof the present invention, further comprises a soap, wherein the soap isselected from the group consisting of sodium stearate, sodium laurate,sodium tallowate, sodium palmitate, potassium stearate, potassiumlaurate, potassium tallowate, potassium palmitate and mixtures thereof(more preferably, wherein the soap is selected from the group consistingof sodium stearate, sodium laurate, potassium stearate, potassiumlaurate and mixtures thereof; still more preferably, wherein the soap isselected from the group consisting of sodium stearate, potassiumstearate and mixtures thereof; most preferably, wherein the soap issodium stearate). Most preferably, the personal care composition of thepresent invention, further comprises a soap, wherein the soap isselected from the group consisting of sodium stearate, sodium laurate,sodium tallowate, sodium palmitate, potassium stearate, potassiumlaurate, potassium tallowate, potassium palmitate and mixtures thereof(more preferably, wherein the soap is selected from the group consistingof sodium stearate, sodium laurate, potassium stearate, potassiumlaurate and mixtures thereof; still more preferably, wherein the soap isselected from the group consisting of sodium stearate, potassiumstearate and mixtures thereof; most preferably, wherein the soap issodium stearate); and wherein the personal care composition is a bodywash formulation.

Preferably, the personal care composition of the present inventionfurther comprises a colorant. More preferably, the personal carecomposition of the present invention, further comprises a colorant,wherein the personal care composition is a body wash formulation.

Some embodiments of the present invention will now be described indetail in the following Examples.

Comparative Examples C1-C9 and Examples 1-11

In each of Comparative Examples C1-C9 and Examples 1-11, a 500 mL,four-necked, round-bottomed flask was charged with the InitialComponents (as identified in TABLE 1 in the quantities noted in TABLE1). The flask was then fitted with a nitrogen inlet connected to a 60 mLpressure equalizing addition funnel, rubber septum cap, a stirringpaddle connected to an electric motor, and a Claisen adaptor connectedto a Friedrich condenser with a mineral oil bubbler outlet.

To the addition funnel was then charged a mixture of glycidyl ether (oralkyl bromide) (type and amount noted in TABLE 1) and isopropyl alcohol(in amount noted in TABLE 1). Then, while stirring its contents, thehead space of the flask was purged with a slow, steady flow of nitrogenfor one hour to remove any entrained oxygen.

With continued stirring, a 50% aqueous sodium hydroxide solution wasthen added (in the quantity noted in TABLE 1) drop wise to the flaskcontents using a plastic syringe. Following the addition of the sodiumhydroxide solution, the flask contents were allowed to stir for onehour, after which the solution of glycidyl ether (or alkyl bromide) inisopropyl alcohol in the addition funnel was added drop wise into thecontents of the flask. The contents of the flask were then stirred undernitrogen for 20 minutes. The contents of the flask were then heatedunder nitrogen using a heating mantle and allowed to reflux for 4.5hours.

The contents of the flask were then cooled by placing the flask in anice water bath while maintaining a positive nitrogen pressure on theflask contents. The contents of the flask were then neutralized via theaddition thereto of glacial acetic acid (5.0 g) using a syringe. Thecontents of the flask were then stirred for 10 minutes under nitrogen.The contents of the flask were then vacuum filtered through a largefritted metal Buchner funnel. The resulting filter cake was then washedthree consecutive times in the Buchner funnel. First the filter cake waswashed by adding a mixture of water (36 g) and isopropyl alcohol (164 g)to the filter cake in the Buchner funnel and stirring the contents forfive minutes followed by vacuum removal of the wash liquor through theBuchner funnel. Then the filter cake was washed by adding a mixture ofwater (20 g) and isopropyl alcohol (180 g) to the filter cake in theBuchner funnel and stirring the contents for five minutes followed byvacuum removal of the wash liquor through the Buchner funnel. Finally,the filter cake was washed by adding a mixture of isopropyl alcohol (200g), 40% aqueous glyoxal (0.44 g) and acetic acid (0.14 g) to the filtercake in the Buchner funnel and stirring the contents for five minutesfollowed by vacuum removal of the wash liquor through the Buchnerfunnel. The filter cake was then briefly air-dried before being driedovernight under vacuum at 50° C. The filter cake was then manuallyground using a mortar and pestle and then sieved through a #30 U.S.sieve mesh to provide the product.

The mass of product recovered along with the volatiles and ash contentof the product are provided in TABLE 2.

TABLE 1 Initial Components Addition Funnel Hydroxyethyl IsopropylGlycidyl ether Cellulose alcohol Deionized 50% aq. (except as indicated)(HEC) (IPA) water NaOH Mole Ratio (HYD) IPA Ex. # Type (g) (g) (g) (g)HYD/HEC NaOH/HEC Type (g) (g) C1 A 23.36 121 19 4.19 0.20 0.63 n-butyl-2.2 6.0 C2 A 22.93 122 19 4.15 0.10 0.64 n-butyl- 1.1 6.1 C3 A 23.10 11818 4.16 0.30 0.63 n-butyl- 3.4 6.0 C4 A 23.01 118 18 4.20 0.25 0.63n-butyl- 2.7 6.1 C5 A 23.68 119 18 4.07 0.20 0.60 isobutyl- 2.2 6.0 C6 A23.16 118 19 4.21 0.10 0.64 isobutyl- 1.1 6.0 C7 A 23.08 120 20 4.100.25 0.63 isobutyl- 2.7 6.0 C8 A 23.25 118 18 4.09 0.30 0.62 isobutyl-3.4 6.0 C9 B 23.01 119 20 4.21 0.26 0.63 n-octyl- 4.1 6.0 1 A 23.34 11919 4.13 0.29 0.62 n-octyl- 4.5 8.3 2 A 23.07 119 18 4.26 0.20 0.65n-octyl- 3.1 6.1 3 A 23.08 118 18 4.18 0.10 0.64 n-octyl- 1.6 6.1 4 A23.02 118 18 4.20 0.26 0.63 n-octyl- 4.0 6.0 5 A 23.61 120 19 4.08 0.290.61 2-ethyl hexyl- 4.5 8.1 6 A 23.24 119 19 4.18 0.19 0.63 2-ethylhexyl- 3.0 7.3 7 A 23.30 118 18 4.25 0.10 0.64 2-ethyl hexyl- 1.6 6.3 8A 23.02 118 18 4.30 0.26 0.64 2-ethyl hexyl- 4.0 8.0 9 C 23.03 120 193.80 0.26 0.64 n-octyl- 3.7 6.0 10 A 23.22 120 19 3.95 0.27 0.60 D 4.36.0 11 A 23.69 119 21 3.90 0.26 0.58 E 4.3 6.1 A - CELLOSIZE ™ QP-100 MHhydroxyethyl cellulose with a weight average molecular weight, M_(W), of1,600,000 available from The Dow Chemical Company B - CELLOSIZE ™ AM-103hydroxyethyl cellulose with a M_(W) of 380,000 available from The DowChemical Company C - CELLOSIZE ™ AP-4400MH hydroxyethyl cellulose with aM_(W) of 900,000 available from The Dow Chemical Company D - n-octylbromide used in place of glycidyl ether in this Example in quantitylisted E - 2-ethyl hexyl bromide used in place of glycidyl ether in thisExample in quantity listed

Example 12

In Example 12, a 500 mL, four-necked, round-bottomed flask was chargedwith the CELLOSIZE™ HEC QP-52,000H (33.89 g) and a mixture of isopropylalcohol (174.7 g) and distilled water (27.5 g). The flask was thenfitted with a stirring paddle and electric motor, a rubber serum cap, anitrogen inlet and a Claisen adaptor fitted with a subsurfacethermocouple and a Friedrich condenser connected to a mineral oilbubbler. The thermocouple was connected to a J-KEM controller and to aheating mantle.

While stirring the slurry, the head space in the flask was purged withnitrogen for one hour. Then a 50% aqueous sodium hydroxide solution(4.37 g) was added dropwise to the flask contents using a plasticsyringe. The flask contents were left to stir under nitrogen for 30minutes. Then 1-bromododecane (3.32 g) was added dropwise to the flaskover a period of a minute. The flask contents were left to stir undernitrogen for 10 minutes. The flask contents were then heated to refluxfor 4.5 hours with a 100° C. set point temperature on the J-KEMcontroller.

The contents of the flask were then cooled to room temperature byplacing the flask in an ice water bath while maintaining a positivenitrogen pressure on the flask contents. The contents of the flask werethen neutralized via the addition thereto of glacial acetic acid (6.43g) using a syringe. The contents of the flask were then stirred for 10minutes under nitrogen. The contents of the flask were then vacuumfiltered through a large fritted metal Buchner funnel. The resultingfilter cake was then washed four consecutive times in the Buchnerfunnel. First the filter cake was washed by adding a mixture of water(49 g) and isopropyl alcohol (221 g) to the filter cake in the Buchnerfunnel and stirring the contents for five minutes followed by vacuumremoval of the wash liquor through the Buchner funnel. Then the filtercake was washed by adding a mixture of water (20 g) and isopropylalcohol (180 g) to the filter cake in the Buchner funnel and stirringthe contents for five minutes followed by vacuum removal of the washliquor through the Buchner funnel. Then, the filter cake was washed byadding isopropyl alcohol (180 g) to the filter cake in the Buchnerfunnel and stirring the contents for five minutes followed by vacuumremoval of the wash liquor through the Buchner funnel. Finally, thefilter cake was washed by adding isopropyl alcohol (180 g), 40% aqueousglyoxal (0.60 g) and acetic acid (0.20 g) to the filter cake in theBuchner funnel and stirring the contents for five minutes followed byvacuum removal of the wash liquor through the Buchner funnel. The filtercake was then briefly air-dried before being dried overnight undervacuum at 50° C. The filter cake was then manually ground using a mortarand pestle and sieved through a #30 U.S. sieve mesh plate to provide theproduct.

The mass of product recovered along with the volatiles and ash contentof the product are provided in TABLE 2.

Example 13

In Example 13, a 500 mL, four-necked, round-bottomed flask was chargedwith the CELLOSIZE™ HEC QP-52,000H (33.78 g) and a mixture of isopropylalcohol (174.9 g) and distilled water (27.3 g). The flask was thenfitted with a stirring paddle and electric motor, a rubber serum cap, anitrogen inlet and a Claisen adaptor fitted with a subsurfacethermocouple and a Friedrich condenser connected to a mineral oilbubbler. The thermocouple was connected to a J-KEM controller and to aheating mantle.

While stirring the slurry, the head space in the flask was purged withnitrogen for one hour. Then a 50% aqueous sodium hydroxide solution(5.43 g) was added dropwise to the flask contents using a plasticsyringe. The flask contents were left to stir under nitrogen for 30minutes. Then 1-bromododecane (6.67 g) was added dropwise to the flaskover a period of a minute. The flask contents were left to stir undernitrogen for 10 minutes. The flask contents were then heated to refluxfor 4.5 hours with a 100° C. set point temperature on the J-KEMcontroller.

The contents of the flask were then cooled to room temperature byplacing the flask in an ice water bath while maintaining a positivenitrogen pressure on the flask contents. The contents of the flask werethen neutralized via the addition thereto of glacial acetic acid (6.29g) using a syringe. The contents of the flask were then stirred for 10minutes under nitrogen. The contents of the flask were then vacuumfiltered through a large fritted metal Buchner funnel. The resultingfilter cake was then washed four consecutive times in the Buchnerfunnel. First the filter cake was washed by adding a mixture of water(49 g) and isopropyl alcohol (221 g) to the filter cake in the Buchnerfunnel and stirring the contents for five minutes followed by vacuumremoval of the wash liquor through the Buchner funnel. Then the filtercake was washed by adding a mixture of water (20 g) and isopropylalcohol (180 g) to the filter cake in the Buchner funnel and stirringthe contents for five minutes followed by vacuum removal of the washliquor through the Buchner funnel. Then, the filter cake was washed byadding isopropyl alcohol (180 g) to the filter cake in the Buchnerfunnel and stirring the contents for five minutes followed by vacuumremoval of the wash liquor through the Buchner funnel. Finally, thefilter cake was washed by adding isopropyl alcohol (180 g), 40% aqueousglyoxal (0.60 g) and acetic acid (0.20 g) to the filter cake in theBuchner funnel and stirring the contents for five minutes followed byvacuum removal of the wash liquor through the Buchner funnel. The filtercake was then briefly air-dried before being dried overnight undervacuum at 50° C. The filter cake was then manually ground using a mortarand pestle and sieved through a #30 U.S. sieve mesh plate to provide theproduct.

The mass of product recovered along with the volatiles and ash contentof the product are provided in TABLE 2.

Volatiles Content

The volatile content (in wt %) in the product reported in TABLE 2 wasdetermined according to ASTM D-2364.

Ash Content

The ash content (in wt %) in the product reported in TABLE 2 wasdetermined according to ASTM D-2364, with the ash content reported assodium acetate.

Viscosity

The viscosity of a 1 wt % aqueous solution of the product (corrected forash and volatiles) was determined using a TA Instruments DHR-3 rheometerat 25° C., equipped with a stainless steel 60 mm, 0.5° cone and platesensor, a gap set at 17 microns and a shear rate of 6.31 s⁻¹. Theresults are provided in TABLE 2.

TABLE 2 Product Volatiles Ash Viscosity Ex. # (g) (wt %) (wt %) (mPa ·s) C1 22.65 1.44 5.35 4,098 C2 22.41 2.44 5.88 4,560 C3 23.05 2.53 6.473,442 C4 23.10 2.47 7.02 3,651 C5 24.10 2.35 7.48 2,287 C6 22.76 2.746.36 4,219 C7 23.10 3.03 7.23 1,031 C8 24.78 2.91 12.67 3,719 C9 22.073.60 8.10 1,399 1 25.01 2.03 13.44 F 2 22.55 1.46 7.73 4,851 3 22.151.72 6.20 8,970 4 22.34 1.26 7.26 2,155 5 22.91 1.59 6.09 6,113 6 22.681.32 8.04 7,496 7 22.18 1.16 7.49 4,404 8 22.90 1.81 5.92 4,114 9 22.092.90 6.70 4,280 10 22.80 2.60 7.10 9,022 11 22.92 2.60 7.00 3,982 1230.59 1.43 1.87 5,380 13 31.40 1.88 3.63 1,642 F - product insoluble inwater

Degree of Substitution

The degree of substitution of the glycidyl ether (hydrophobic group)substituent on the water-soluble cellulose ether base material for theproduct polymers produced according to Examples 1-3 and 5-7 wasdetermined through analysis of ¹H NMR spectra taken with a Varian Inova600 MHz spectrometer using the following acquisition parameters: 10seconds relaxation delay, 2 seconds acquisition time, 90 degree pulse of7.25 μs, 128-256 scans. All measurements were taken without samplespinning at 10° C. and calibrating with ethylene glycol. The ¹H NMRspectra were referenced at 4.9 ppm for the peak of HOD at the notedtemperature. The degree of substitution determined from the analysis areprovided in TABLE 3.

TABLE 3 Ex. # Degree of Substitution 1 0.094 2 0.083 3 0.034 5 0.093 60.054 7 0.028

Comparative Example C10

The hexadecyl-modified CELLOSIZE™ QP-100MH used herein was preparedaccording to Example 22 of U.S. Pat. No. 9,266,971.

Comparative Examples F1-F5 and Examples 14-19: Body Wash Formulation

Deionized water was added to a beaker. A heat source having a set pointtemperature adjusted to 60° C. was brought into contact with the beaker.While the contents of the beaker were heating, cocamidopropyl betaine(Amphosol® CA available from Stepan Company) and decyl glucoside(EcoSense™ 3000 available from The Dow Chemical Company) were added tothe beaker. Once the beaker contents reached 60° C., disodium laurylsulfosuccinate (Mackanate® LO available from Solvay Novecare) was addedto the beaker. The contents of the beaker were left to stir for 15minutes before removing the heat source from contact with the beaker.Once the beaker contents cooled to 35° C., the additive noted in TABLE 5was added to the contents of the beaker. The pH of the beaker contentswas then adjusted to 6.5 with citric acid and methylisothiazolinone(Neolone 950 available from The Dow Chemical Company) was added toprovide a body wash formulation having the composition noted in TABLE 4.The resulting body wash formulations were allowed to stand for two (2)days and observed for phase separation. The observations are provided inTABLE 5.

TABLE 4 Conc. in Body Wash Component Formulation (wt %) Cocamidopropylbetaine 3.85 Decyl glucoside 6.00 Disodium lauryl sulfosuccinate 4.80Additive noted in TABLE 5 1.00* Citric acid 0.16 Methylisothiazolinone0.05 *unless otherwise noted in TABLE 5

TABLE 5 Body Wash Formulation Additive Observation Comp. Ex. F1 sodiumhydroxypropyl starch* Homogeneous Comp. Ex. F2 CELLOSIZE ™ QP-100MHPhase separated Comp. Ex. F3 Prod. Comp. Ex. C4 Phase separated Comp.Ex. F4 Prod. Comp. Ex. C9 Homogeneous Comp. Ex. F5 Prod. Comp. Ex. C10Phase separated Ex. 14 Prod. Ex. 4 Homogeneous Ex. 15 Prod. Ex. 8Homogeneous Ex. 16 Prod. Ex. 9 Homogeneous Ex. 17 Prod. Ex. 10Homogeneous Ex. 18 Prod. Ex. 12 Homogeneous Ex. 19 Prod. Ex. 13Homogeneous *sodium hydroxypropyl starch was loaded in formulation at 10wt %

Flash Foam

Flash foam measurements were obtained using an Oster® 16-Speed BlenderModel No. 6878-042 and a 1,000 mL graduated cylinder according to thefollowing procedure. A sample (5 g) of the body wash formulation notedin TABLE 6 and water (145 g) were added to the blender. The blendercontents were subjected to blending at the “Grate” setting for tenseconds. The blender contents were then poured into the 1,000 mLgraduated cylinder. The initial height of the foam, H₀, was recorded.After two minutes, the initial liquid level, L₀, was recorded. The flashfoam volume reported in TABLE 6 was determined using the followingequationFlash Foam (in mL)=H ₀ −L ₀.

The viscosity of the body wash formulation was measured using a TAInstruments DHR-3 rheometer at 25° C., equipped with a stainless steel60 mm, 0.5° cone and plate sensor, and a gap set at 17 microns. Theresults are provided in TABLE 6.

TABLE 6 Viscosity at Body Wash Base HEC Weight Average Flash Foam 6.31s⁻¹ Formulation Molecular Weight, M_(W) (mL) (mPa · s) Comp. Ex. F1 —540 ± 31 7,186 Comp. Ex. F4  380,000 — 1,432 Control¹ — 430 ± 26 7,692Ex. 14 1,600,000 442 ± 55 13,600 Ex. 15 1,600,000 417 ± 89 5,844 Ex. 16 900,000 — 6,927 Ex. 17 1,600,000 — 4,290 Ex. 18 1,400,000 — 523 Ex. 191,400,000 — 8,098 ¹Dove Deep Moisture body wash commercially availablefrom Unilever.

We claim:
 1. A body wash formulation, comprising: a vehicle; asurfactant, wherein the surfactant includes at least one alkylpolyglucoside; a water-soluble cellulose ether base material substitutedwith a hydrophobic group, wherein the hydrophobic group is a C₈ linearor branched alkyl group bonded to the water-soluble cellulose ether basematerial via an ether linkage according to Formula I or an ether linkageand a 2-hydroxypropyl group according to Formula II

wherein Cell-O represents the water-soluble cellulose ether basematerial and wherein R is the C₈ linear or branched alkyl group; whereinthe water-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons; wherein the personal carecomposition contains <0.01 wt % alkyl sulfate and <0.01 wt % alkyl ethersulfate; wherein the body wash formulation is thickened using thewater-soluble cellulose ether base material substituted with thehydrophobic group.
 2. The body wash formulation of claim 1, furthercomprising a pH adjusting agent.
 3. The body wash formulation of claim1, further comprising a biocide.
 4. The body wash formulation of claim1, further comprising a fragrance.
 5. The body wash formulation of claim1, further comprising a colorant.
 6. The body wash formulation of claim1, further comprising a soap.
 7. The body wash formulation of claim 1,wherein the water-soluble cellulose ether base material has a weightaverage molecular weight, Mw, of 900,000 to 2,500,000 Daltons.
 8. Thebody wash formulation of claim 7, further comprising at least one of: apH adjusting agent, a biocide, a fragrance, a colorant and a soap.
 9. Abody wash formulation, comprising: a vehicle; a surfactant, wherein thesurfactant includes at least one alkyl polyglucoside; a water-solublecellulose ether base material substituted with a hydrophobic group,wherein the hydrophobic group is a C₈ linear or branched alkyl groupselected from the group consisting of a linear octyl group and abranched ethyl hexyl group, and wherein the hydrophobic group is bondedto the water-soluble cellulose ether base material via an ether linkageaccording to Formula I or an ether linkage and a 2-hydroxypropyl groupaccording to Formula II

wherein Cell-O represents the water-soluble cellulose ether basematerial and wherein R is the C₈ linear or branched alkyl group; whereinthe water-soluble cellulose ether base material has a weight averagemolecular weight, Mw, of >800,000 Daltons; wherein the personal carecomposition contains <0.01 wt % alkyl sulfate and <0.01 wt % alkyl ethersulfate; wherein the body wash formulation is thickened using thewater-soluble cellulose ether base material substituted with thehydrophobic group.
 10. The body wash formulation of claim 9, furthercomprising a pH adjusting agent.
 11. The body wash formulation of claim9, further comprising a biocide.
 12. The body wash formulation of claim9, further comprising a fragrance.
 13. The body wash formulation ofclaim 9, further comprising a colorant.
 14. The body wash formulation ofclaim 9, further comprising a soap.
 15. The body wash formulation ofclaim 9, wherein the water-soluble cellulose ether base material has aweight average molecular weight, Mw, of 900,000 to 2,500,000 Daltons.16. The body wash formulation of claim 15, further comprising at leastone of: a pH adjusting agent, a biocide, a fragrance, a colorant and asoap.